Soil-pulverizer.



C. GRIFFITH.

SOIL PULVERIZER.

APPLICATION FILED AUG. l7. I914.

mamw. Patented Apr. 13, 1915.

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C. GRIFFITH.

sou PULVERIZER.

APPLICATION FILED AUG. 7, I914. 1 13mm? Patented Apr. 13, 1915.

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THE NORRIS PETERS CO. PHO'm LITHO v WASHINGTON, D. C

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CARL GRIFFITH, OF LAIVIOILLE, ILLINOIS.

SOIL-PULVERIZER.

Application filed August 17, 1914.

To all whom it may concern:

Be it known that I, CARL GRIFFITH, a citizen of the United States, residing at Lamoille, in the county of Bureau and State of Illinois, have invented certain new and useful Improvements in Soil-Pulveri'zers, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to soil pulverizers and has for its primary object to provide improved means for simultaneously adjusting a plurality of pulverizing knives or blades and maintaining the same in corresponding angular positions with relation to the machine frame.

The invention has for another important object to provide improved means for mounting or securing the several blades in position.

The invention has for a. further ob ect to generally improve and simplify the construction of machines of the above character whereby the same may be produced at a nominal manufacturing cost, and also to increase their operating efficiency and general serviceability in actual operation.

With the above and other objects in view, the invention consists in the novel construction, combination and arrangement of parts to be hereinafter more fully described, claimed and illustrated in the accompanying drawing, wherein Figure 1 is a side elevation of a portion of a soil pulverizing machine provided with my improved blade mounting and adjusting means; Fig. 2 is a horizontal section taken on the line 2-2 of Fig. 1; Fig. 3 is a section taken on the line 33 of Fig. 1; Fig. 4 is an enlarged detail fragmentary perspective View; and Fig. 5 is an enlarged section taken on the line 55 of Fig. 2.

Referring in detail to the drawing, 5 indicates a pair of parallel longitudinal bars which are adapted to be secured in the machine frame (not shown) in any approved manner. These bars are properly spaced apart by means of the blocks indicated at 6. Each of the bars 5 is provided upon its lower edge and at spaced points with bearing enlargements indicated at 7, through which the cylindrical shanks 8 extend, and in which said shanks are loosely mounted for rotative movement. The shanks 8 are preferably integrally formed upon one end of the pulverizing blades 9 and are provided Specification of Letters Patent.

Patented Apr. 113, 1915. Serial No. 857,208.

with peripheral longitudinally extending ribs 10, for a purpose which will be presently explained.

In the illustrated embodiment of my invention, I have shown a series of four pulverizing blades. The levers 11 extend in relatively opposite inclined directions and have their lower portions inwardly curved and twisted as at 12, so that the same are disposed in a plane at right angles to the body of the blade and extend between the spaced bars 5. These levers 11 are connected to the intermediate pulverizing blades 9 and their end portions 12 are provided with sleeves 13, the inner faces of which are longitudinally grooved or corrugated, as at 14, to accommodate the ribs 10 on the shanks 8. The extremities of the levers 11 are up wardly extended and clamped against the body of the blade by means of the bolts 15 on which suitable nuts 15 are threaded. It is obvious that when the lower ends of the levers 11 are thus connected to the shanks of the pulverizing blades, any relative turning movement of the levers and then blades is effectually prevented. Vertically disposed bars or links 17 are similarly secured at their lower ends to the shanks of the end blades 9. The upper end portions of the levers 11 are provided with longitudinally extending slots 18 and bolts 19 are loosely movable therein. These bolts extend through the upper ends of the bars or links 17 and through parallel bars 20 which connect the levers 11. One of the bolts 19 also extends through the operating lever 21, the lower end of which is connected to the link 17, as indicated at 22. This lever is equipped with the usual manually operable locking dog, indicated at 23, for engagement with the teeth of a rack 24: secured upon the frame bar 5.

From the above description, taken in connection with the accompanying drawing, it is believed that the construction, manner of operation and several advantages of my invention will be apparent. When the lever 21 is moved in either direction, the cutting or pulverizing blades 9 are simultaneously moved to the same extent and disposed at the same angle with respect to the bars 5 in which they are mounted,.it being understood that the bolts 19 will slide freely in the slot 18 of the levers 11 during this manipulation of the operating lever. The blades 9 are also at all times maintained in the same cutting plane so that the line of the cut inthe ground is at all times even, irrespective of the particu- V lar degree of angularity at which said blades be seen that the same can be produced at very small, manufacturing cost. A pulverizing-machine provided with my improved 7 blade mounting and adjusting means is also highly serviceable and efiicient in practical operation. e.

While I have shown the construction and arrangement of the several elements employed, it will be understood that the invention is susceptible of considerable modifica- Ition therein, and I therefore reserve the privilege of resorting to all such legitimate modifications as may be fairly embodied within the spirit and scope of the invention as claimed. -I claim:

- .1. In a soil pulverizing machine, a plural ity of pulverizing blades each provided with a'rotatably mounted cylindrical shank, le-

7 vers connected to the shanks of the contiguous blades and extendingin relatively opposite directions therefrom, said levers being provided with longitudinally extending w slots, bars connected to the shanks of the other blades, parallel bars connecting said latter bars, bolts extending through said bars and the slots in said levers, and an operating lever connected to said parallel bars by oneof said bolts and adapted to be ma- Copies of this :patent may be obtained for nipulated to simultaneously position the pulverizing blades at various angles.

2. In a soil pulverizing machine, a plurality of pulverizing blades each provided upon its end with a rotatably mounted shank, le-

vers removably clamped upon the shanks of contiguous blades and extending in relatively opposite directions therefrom, each of said levers being provided with a longitudinal slot, bars clamped at one of their ends upon the shanks of the other pulverizing blades, a connecting bar loosely bolted at its ends to said first named bars, bolts extending through the slots in said levers, and an operating lever connected to one of said bolts and adapted to be manipulated to move the pulverizing blades in unison to various angular positions with respect to the machineframe. I

3. In a soil pulverizing machine, spaced parallel bars, a plurality of pulverizing blades each provided upon one end with a cylindrical shank rotatably mounted in said bars, said shank having a series of longitudinal peripheral ribs, oppositely inclined levers provided with clamping sleeves upon their lower ends having corrugations to cooperate with said ribs, means for securely clamping saidsleeves upon the shanks of the blades, bars similarly connected to the shanks of the other blades and slidably connected to said levers, and means for simultaneously shifting said levers and bars to move the pulverizing blades in unison to various angular positions with respect to the machine frame.

In testimony whereof I hereunto aflix my signature in the presence of two witnesses.

CARL GRIFFITH. Witnesses W. N. RnMsB'URG, J. H. SHOWALTER.

five cents each, by addressing the Commissioner of Patents,

Washington, D. 0." 

